About the security content of Swift 5.1.1 for Ubuntu - Apple Support

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Swift 5.1.1 for Ubuntu

Released October 11, 2019

Foundation

Available for: Ubuntu 14.04, 16.04, and 18.04

Impact: Incorrect management of file descriptors in URLSession could lead to inadvertent data disclosure

Description: This issue was addresses by updating incorrect URLSession file descriptors management logic to match Swift 5.0.

CVE-2019-8790: Apple